./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/process_queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-data/process_queue.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:13:19,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:13:19,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:13:19,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:13:19,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:13:19,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:13:19,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:13:19,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:13:19,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:13:19,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:13:19,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:13:19,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:13:19,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:13:19,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:13:19,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:13:19,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:13:19,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:13:19,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:13:19,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:13:19,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:13:19,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:13:19,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:13:19,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:13:19,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:13:19,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:13:19,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:13:19,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:13:19,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:13:19,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:13:19,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:13:19,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:13:19,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:13:19,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:13:19,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:13:19,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:13:19,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:13:19,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:13:19,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:13:19,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:13:19,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:13:19,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:13:19,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:13:19,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:13:19,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:13:19,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:13:19,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:13:19,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:13:19,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:13:19,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:13:19,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:13:19,868 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:13:19,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:13:19,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:13:19,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:13:19,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:13:19,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:13:19,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:13:19,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:13:19,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:13:19,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:13:19,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:13:19,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:13:19,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:13:19,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:13:19,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:13:19,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:13:19,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:13:19,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:13:19,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:13:19,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:13:19,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:13:19,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2021-12-21 12:13:20,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:13:20,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:13:20,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:13:20,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:13:20,099 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:13:20,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/process_queue.i [2021-12-21 12:13:20,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db5f4d713/72d14d8c84c748c7a568f993c79ac009/FLAGfe2ea1991 [2021-12-21 12:13:20,523 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:13:20,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/process_queue.i [2021-12-21 12:13:20,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db5f4d713/72d14d8c84c748c7a568f993c79ac009/FLAGfe2ea1991 [2021-12-21 12:13:20,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db5f4d713/72d14d8c84c748c7a568f993c79ac009 [2021-12-21 12:13:20,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:13:20,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:13:20,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:13:20,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:13:20,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:13:20,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647209aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20, skipping insertion in model container [2021-12-21 12:13:20,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:13:20,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:13:20,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-12-21 12:13:20,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:13:20,829 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:13:20,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-12-21 12:13:20,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:13:20,899 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:13:20,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20 WrapperNode [2021-12-21 12:13:20,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:13:20,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:13:20,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:13:20,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:13:20,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,936 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2021-12-21 12:13:20,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:13:20,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:13:20,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:13:20,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:13:20,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:13:20,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:13:20,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:13:20,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:13:20,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (1/1) ... [2021-12-21 12:13:20,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:13:20,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:21,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:13:21,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:13:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:13:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 12:13:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 12:13:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:13:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:13:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:13:21,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:13:21,168 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:13:21,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:13:21,294 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:13:21,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:13:21,298 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 12:13:21,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:13:21 BoogieIcfgContainer [2021-12-21 12:13:21,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:13:21,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:13:21,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:13:21,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:13:21,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:13:20" (1/3) ... [2021-12-21 12:13:21,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1830a60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:13:21, skipping insertion in model container [2021-12-21 12:13:21,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:13:20" (2/3) ... [2021-12-21 12:13:21,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1830a60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:13:21, skipping insertion in model container [2021-12-21 12:13:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:13:21" (3/3) ... [2021-12-21 12:13:21,313 INFO L111 eAbstractionObserver]: Analyzing ICFG process_queue.i [2021-12-21 12:13:21,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:13:21,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:13:21,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:13:21,352 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:13:21,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:13:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:13:21,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:21,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:21,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2060272908, now seen corresponding path program 1 times [2021-12-21 12:13:21,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70547420] [2021-12-21 12:13:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:21,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:21,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:21,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70547420] [2021-12-21 12:13:21,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70547420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:21,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:21,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:13:21,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871056329] [2021-12-21 12:13:21,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:13:21,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:13:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:13:21,612 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:21,641 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2021-12-21 12:13:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:13:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:13:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:21,649 INFO L225 Difference]: With dead ends: 51 [2021-12-21 12:13:21,649 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 12:13:21,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:13:21,654 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:21,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:13:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 12:13:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-21 12:13:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-12-21 12:13:21,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2021-12-21 12:13:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-12-21 12:13:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-12-21 12:13:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:13:21,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:21,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:21,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:13:21,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1911586027, now seen corresponding path program 1 times [2021-12-21 12:13:21,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515218756] [2021-12-21 12:13:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:21,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:21,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515218756] [2021-12-21 12:13:21,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515218756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:21,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:21,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:13:21,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528615840] [2021-12-21 12:13:21,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:21,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:13:21,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:13:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:13:21,735 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:21,792 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-12-21 12:13:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:13:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:13:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:21,808 INFO L225 Difference]: With dead ends: 56 [2021-12-21 12:13:21,808 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 12:13:21,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:13:21,809 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:21,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 86 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:13:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 12:13:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-21 12:13:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-21 12:13:21,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2021-12-21 12:13:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:21,814 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-21 12:13:21,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-21 12:13:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:13:21,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:21,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:21,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:13:21,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 459687026, now seen corresponding path program 1 times [2021-12-21 12:13:21,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451469596] [2021-12-21 12:13:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:21,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:21,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:21,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451469596] [2021-12-21 12:13:21,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451469596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:21,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:21,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:13:21,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884204018] [2021-12-21 12:13:21,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:21,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:13:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:13:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:13:21,998 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:22,141 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2021-12-21 12:13:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:13:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:13:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:22,144 INFO L225 Difference]: With dead ends: 74 [2021-12-21 12:13:22,144 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 12:13:22,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:13:22,155 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:22,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:13:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 12:13:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2021-12-21 12:13:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-12-21 12:13:22,164 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 11 [2021-12-21 12:13:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:22,164 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-12-21 12:13:22,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-12-21 12:13:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:13:22,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:22,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:22,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:13:22,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash 608373907, now seen corresponding path program 1 times [2021-12-21 12:13:22,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527912844] [2021-12-21 12:13:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:22,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:22,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:22,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527912844] [2021-12-21 12:13:22,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527912844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:22,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:22,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:13:22,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390979244] [2021-12-21 12:13:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:22,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:13:22,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:13:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:13:22,216 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:22,263 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2021-12-21 12:13:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:13:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:13:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:22,264 INFO L225 Difference]: With dead ends: 106 [2021-12-21 12:13:22,265 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 12:13:22,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:13:22,266 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:22,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:13:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 12:13:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-12-21 12:13:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-12-21 12:13:22,272 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 11 [2021-12-21 12:13:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:22,272 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-12-21 12:13:22,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-12-21 12:13:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 12:13:22,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:22,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:22,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:13:22,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:22,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2110602732, now seen corresponding path program 1 times [2021-12-21 12:13:22,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:22,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005682486] [2021-12-21 12:13:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:22,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:22,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005682486] [2021-12-21 12:13:22,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005682486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62126944] [2021-12-21 12:13:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:22,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:22,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:22,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:13:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-21 12:13:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:22,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:22,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-21 12:13:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:22,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:22,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-21 12:13:22,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-12-21 12:13:22,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-21 12:13:22,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 12:13:22,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-12-21 12:13:22,630 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-21 12:13:22,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 12:13:22,767 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-21 12:13:22,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-12-21 12:13:22,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-12-21 12:13:22,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:13:22,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-12-21 12:13:22,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175645859] [2021-12-21 12:13:22,790 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:22,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:13:22,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:13:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:13:22,792 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:22,977 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-12-21 12:13:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 12:13:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 12:13:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:22,978 INFO L225 Difference]: With dead ends: 118 [2021-12-21 12:13:22,978 INFO L226 Difference]: Without dead ends: 80 [2021-12-21 12:13:22,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:13:22,979 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 110 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:22,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 130 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:13:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-21 12:13:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-12-21 12:13:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-12-21 12:13:22,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 14 [2021-12-21 12:13:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:22,991 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-12-21 12:13:22,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-12-21 12:13:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 12:13:22,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:22,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:23,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 12:13:23,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:23,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 969563825, now seen corresponding path program 1 times [2021-12-21 12:13:23,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:23,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144906185] [2021-12-21 12:13:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:23,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:23,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144906185] [2021-12-21 12:13:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144906185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:23,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:23,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:13:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008792496] [2021-12-21 12:13:23,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:13:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:13:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:13:23,291 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:23,320 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-12-21 12:13:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:13:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 12:13:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:23,321 INFO L225 Difference]: With dead ends: 109 [2021-12-21 12:13:23,321 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 12:13:23,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:13:23,322 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:23,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 75 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:13:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 12:13:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-12-21 12:13:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-12-21 12:13:23,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 19 [2021-12-21 12:13:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:23,328 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-12-21 12:13:23,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-12-21 12:13:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 12:13:23,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:23,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 12:13:23,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1377311315, now seen corresponding path program 1 times [2021-12-21 12:13:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464557726] [2021-12-21 12:13:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:23,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:13:23,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464557726] [2021-12-21 12:13:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464557726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425374817] [2021-12-21 12:13:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:23,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:23,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:23,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:23,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:13:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 12:13:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:23,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2021-12-21 12:13:23,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:23,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:23,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:23,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:23,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:23,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:23,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:23,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 12:13:23,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:23,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-21 12:13:23,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:13:23,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:23,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:23,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2021-12-21 12:13:23,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-21 12:13:23,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-21 12:13:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:13:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425374817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:24,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:24,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-21 12:13:24,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693726727] [2021-12-21 12:13:24,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:24,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 12:13:24,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 12:13:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:13:24,049 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:25,199 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2021-12-21 12:13:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 12:13:25,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 12:13:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:25,202 INFO L225 Difference]: With dead ends: 320 [2021-12-21 12:13:25,203 INFO L226 Difference]: Without dead ends: 267 [2021-12-21 12:13:25,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1823, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 12:13:25,204 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 435 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:25,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 465 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:13:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-21 12:13:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 139. [2021-12-21 12:13:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.289855072463768) internal successors, (178), 138 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 178 transitions. [2021-12-21 12:13:25,216 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 178 transitions. Word has length 22 [2021-12-21 12:13:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:25,217 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 178 transitions. [2021-12-21 12:13:25,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 178 transitions. [2021-12-21 12:13:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 12:13:25,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:25,218 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:25,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 12:13:25,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1662719123, now seen corresponding path program 2 times [2021-12-21 12:13:25,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:25,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957448557] [2021-12-21 12:13:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:25,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:25,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957448557] [2021-12-21 12:13:25,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957448557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332061055] [2021-12-21 12:13:25,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:13:25,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:25,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:25,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:25,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:13:25,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:13:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:13:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-21 12:13:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:25,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:25,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:25,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:25,849 INFO L353 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-12-21 12:13:25,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-12-21 12:13:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-12-21 12:13:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-21 12:13:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2021-12-21 12:13:26,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2021-12-21 12:13:26,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2021-12-21 12:13:26,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:26,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,183 INFO L353 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-12-21 12:13:26,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2021-12-21 12:13:26,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:26,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 49 [2021-12-21 12:13:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:26,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 12:13:26,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-12-21 12:13:26,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 12:13:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:26,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_524 (Array Int Int)) (v_ArrVal_512 (Array Int Int)) (v_ArrVal_517 (Array Int Int)) (v_ArrVal_508 (Array Int Int)) (v_ArrVal_518 (Array Int Int)) (v_ArrVal_509 (Array Int Int)) (v_ArrVal_523 Int)) (or (<= 1 (select (select (store (store |c_#memory_int| v_ArrVal_523 v_ArrVal_508) |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_518) (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_523 (store v_ArrVal_517 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_523 v_ArrVal_517) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_523 v_ArrVal_524) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_523)) v_ArrVal_523) 8)) (+ 4 (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_523 (store v_ArrVal_509 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_523 v_ArrVal_509) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_523 v_ArrVal_512) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_523) 8)))) (not (= (select |c_#valid| v_ArrVal_523) 0)) (not (< v_ArrVal_523 |c_#StackHeapBarrier|)))) is different from false [2021-12-21 12:13:26,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:26,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 377 treesize of output 380 [2021-12-21 12:13:26,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 242 [2021-12-21 12:13:26,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 104 [2021-12-21 12:13:26,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 168 [2021-12-21 12:13:26,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 113 [2021-12-21 12:13:26,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 120 [2021-12-21 12:13:28,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:28,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 236 [2021-12-21 12:13:28,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 183 [2021-12-21 12:13:28,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 183 [2021-12-21 12:13:28,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 187 [2021-12-21 12:13:28,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 175 [2021-12-21 12:13:28,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 171 [2021-12-21 12:13:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-12-21 12:13:28,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332061055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:28,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:28,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2021-12-21 12:13:28,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368189399] [2021-12-21 12:13:28,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:28,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 12:13:28,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 12:13:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=552, Unknown=5, NotChecked=48, Total=702 [2021-12-21 12:13:28,337 INFO L87 Difference]: Start difference. First operand 139 states and 178 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:30,879 INFO L93 Difference]: Finished difference Result 379 states and 486 transitions. [2021-12-21 12:13:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-21 12:13:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 12:13:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:30,892 INFO L225 Difference]: With dead ends: 379 [2021-12-21 12:13:30,892 INFO L226 Difference]: Without dead ends: 377 [2021-12-21 12:13:30,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=844, Invalid=3435, Unknown=15, NotChecked=128, Total=4422 [2021-12-21 12:13:30,895 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 283 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:30,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 751 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 566 Invalid, 0 Unknown, 353 Unchecked, 0.6s Time] [2021-12-21 12:13:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-21 12:13:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 293. [2021-12-21 12:13:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.2910958904109588) internal successors, (377), 292 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-12-21 12:13:30,929 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 25 [2021-12-21 12:13:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:30,930 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-12-21 12:13:30,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-12-21 12:13:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:13:30,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:30,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:30,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 12:13:31,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:31,136 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash 211481171, now seen corresponding path program 3 times [2021-12-21 12:13:31,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:31,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949640278] [2021-12-21 12:13:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:31,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:31,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949640278] [2021-12-21 12:13:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949640278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077065849] [2021-12-21 12:13:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:13:31,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:31,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:31,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:13:31,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 12:13:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:13:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-21 12:13:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:31,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:31,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:31,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:31,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 12:13:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:31,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 12:13:31,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-12-21 12:13:31,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-12-21 12:13:31,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:31,855 INFO L353 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-12-21 12:13:31,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-12-21 12:13:31,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-12-21 12:13:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,124 INFO L353 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2021-12-21 12:13:32,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 56 [2021-12-21 12:13:32,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-12-21 12:13:32,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2021-12-21 12:13:32,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:32,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,156 INFO L353 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-12-21 12:13:32,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2021-12-21 12:13:32,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:32,413 INFO L353 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-12-21 12:13:32,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 83 [2021-12-21 12:13:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:32,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-12-21 12:13:32,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:13:32,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-21 12:13:32,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252339874] [2021-12-21 12:13:32,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 12:13:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 12:13:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:13:32,421 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:33,242 INFO L93 Difference]: Finished difference Result 1040 states and 1355 transitions. [2021-12-21 12:13:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 12:13:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 12:13:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:33,245 INFO L225 Difference]: With dead ends: 1040 [2021-12-21 12:13:33,245 INFO L226 Difference]: Without dead ends: 786 [2021-12-21 12:13:33,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-12-21 12:13:33,247 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 256 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:33,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 415 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:13:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-21 12:13:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 561. [2021-12-21 12:13:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.2714285714285714) internal successors, (712), 560 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 712 transitions. [2021-12-21 12:13:33,277 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 712 transitions. Word has length 28 [2021-12-21 12:13:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:33,277 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 712 transitions. [2021-12-21 12:13:33,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 712 transitions. [2021-12-21 12:13:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 12:13:33,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:33,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:33,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:33,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:33,497 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1324510600, now seen corresponding path program 1 times [2021-12-21 12:13:33,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:33,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184968104] [2021-12-21 12:13:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:33,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:13:33,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184968104] [2021-12-21 12:13:33,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184968104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818456297] [2021-12-21 12:13:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:33,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:33,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:33,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:13:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:13:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:13:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:13:33,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818456297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:33,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:33,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 12:13:33,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248635222] [2021-12-21 12:13:33,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:33,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:13:33,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:13:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:13:33,740 INFO L87 Difference]: Start difference. First operand 561 states and 712 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:33,892 INFO L93 Difference]: Finished difference Result 1379 states and 1767 transitions. [2021-12-21 12:13:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:13:33,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 12:13:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:33,895 INFO L225 Difference]: With dead ends: 1379 [2021-12-21 12:13:33,895 INFO L226 Difference]: Without dead ends: 834 [2021-12-21 12:13:33,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:13:33,897 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:33,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:13:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-21 12:13:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 796. [2021-12-21 12:13:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.2440251572327043) internal successors, (989), 795 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 989 transitions. [2021-12-21 12:13:33,953 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 989 transitions. Word has length 29 [2021-12-21 12:13:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:33,953 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 989 transitions. [2021-12-21 12:13:33,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 989 transitions. [2021-12-21 12:13:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 12:13:33,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:33,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:33,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:34,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 12:13:34,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -313393350, now seen corresponding path program 1 times [2021-12-21 12:13:34,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511019324] [2021-12-21 12:13:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:34,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:34,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511019324] [2021-12-21 12:13:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511019324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900953488] [2021-12-21 12:13:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:34,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:34,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:13:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-21 12:13:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:34,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:34,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:34,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:34,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:34,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:34,520 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-21 12:13:34,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 12:13:34,797 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 12:13:34,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 99 [2021-12-21 12:13:34,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 30 [2021-12-21 12:13:34,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-21 12:13:34,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-21 12:13:34,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-21 12:13:34,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:35,022 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4)) 1) (forall ((v_ArrVal_865 (Array Int Int)) (v_ArrVal_867 (Array Int Int)) (v_ArrVal_866 Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse0 (select |c_#memory_int| .cse2)) (.cse1 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4))) (or (not (<= (select .cse0 .cse1) (+ v_ArrVal_866 1))) (<= 1 (select (select (store |c_#memory_int| .cse2 (store .cse0 .cse1 v_ArrVal_866)) (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_867) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_865) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4)))))))) is different from false [2021-12-21 12:13:35,147 INFO L353 Elim1Store]: treesize reduction 16, result has 84.9 percent of original size [2021-12-21 12:13:35,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 193 [2021-12-21 12:13:35,276 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_867 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) v_ArrVal_867) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) |c_ULTIMATE.start_check_queue_~n~0#1.base|)) (forall ((v_ArrVal_865 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) v_ArrVal_865) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) |c_ULTIMATE.start_check_queue_~n~0#1.offset|))) is different from false [2021-12-21 12:13:35,282 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_865 (Array Int Int))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) v_ArrVal_865) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (forall ((v_ArrVal_867 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_867) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) .cse0)))) is different from false [2021-12-21 12:13:35,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-21 12:13:35,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-21 12:13:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-12-21 12:13:35,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900953488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:35,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:35,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 12] total 25 [2021-12-21 12:13:35,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897245650] [2021-12-21 12:13:35,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:35,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 12:13:35,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 12:13:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=398, Unknown=4, NotChecked=126, Total=600 [2021-12-21 12:13:35,324 INFO L87 Difference]: Start difference. First operand 796 states and 989 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:37,204 INFO L93 Difference]: Finished difference Result 1480 states and 1869 transitions. [2021-12-21 12:13:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 12:13:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 12:13:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:37,208 INFO L225 Difference]: With dead ends: 1480 [2021-12-21 12:13:37,208 INFO L226 Difference]: Without dead ends: 1210 [2021-12-21 12:13:37,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=659, Invalid=2319, Unknown=4, NotChecked=324, Total=3306 [2021-12-21 12:13:37,210 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 294 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:37,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 534 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 490 Invalid, 0 Unknown, 602 Unchecked, 0.6s Time] [2021-12-21 12:13:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-12-21 12:13:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 875. [2021-12-21 12:13:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.2551487414187643) internal successors, (1097), 874 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1097 transitions. [2021-12-21 12:13:37,261 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1097 transitions. Word has length 29 [2021-12-21 12:13:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:37,261 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1097 transitions. [2021-12-21 12:13:37,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1097 transitions. [2021-12-21 12:13:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:13:37,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:37,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:37,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:37,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:37,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -190827821, now seen corresponding path program 1 times [2021-12-21 12:13:37,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928821367] [2021-12-21 12:13:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:37,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:37,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928821367] [2021-12-21 12:13:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928821367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:37,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044408040] [2021-12-21 12:13:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:37,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:37,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:37,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:13:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-21 12:13:37,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:37,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:37,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:37,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:37,736 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-21 12:13:37,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 12:13:37,861 INFO L353 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-12-21 12:13:37,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-12-21 12:13:37,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-21 12:13:38,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-21 12:13:38,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-21 12:13:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:13:38,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:38,125 INFO L353 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2021-12-21 12:13:38,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-12-21 12:13:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 12:13:38,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044408040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:38,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:38,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 19 [2021-12-21 12:13:38,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514015510] [2021-12-21 12:13:38,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:38,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 12:13:38,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 12:13:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-12-21 12:13:38,225 INFO L87 Difference]: Start difference. First operand 875 states and 1097 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:38,964 INFO L93 Difference]: Finished difference Result 1727 states and 2192 transitions. [2021-12-21 12:13:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 12:13:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 12:13:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:38,967 INFO L225 Difference]: With dead ends: 1727 [2021-12-21 12:13:38,967 INFO L226 Difference]: Without dead ends: 786 [2021-12-21 12:13:38,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=1311, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 12:13:38,968 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 294 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:38,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 473 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 233 Invalid, 0 Unknown, 140 Unchecked, 0.3s Time] [2021-12-21 12:13:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-21 12:13:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 576. [2021-12-21 12:13:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.2782608695652173) internal successors, (735), 575 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 735 transitions. [2021-12-21 12:13:38,999 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 735 transitions. Word has length 30 [2021-12-21 12:13:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:39,000 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 735 transitions. [2021-12-21 12:13:39,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 735 transitions. [2021-12-21 12:13:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:13:39,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:39,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:39,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:39,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:39,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash -583854831, now seen corresponding path program 1 times [2021-12-21 12:13:39,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:39,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698215249] [2021-12-21 12:13:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:39,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 12:13:39,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698215249] [2021-12-21 12:13:39,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698215249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:13:39,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:13:39,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:13:39,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723242629] [2021-12-21 12:13:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:13:39,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:13:39,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:13:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:13:39,256 INFO L87 Difference]: Start difference. First operand 576 states and 735 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:39,286 INFO L93 Difference]: Finished difference Result 993 states and 1268 transitions. [2021-12-21 12:13:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:13:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 12:13:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:39,289 INFO L225 Difference]: With dead ends: 993 [2021-12-21 12:13:39,289 INFO L226 Difference]: Without dead ends: 686 [2021-12-21 12:13:39,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:13:39,291 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:39,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:13:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-12-21 12:13:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 576. [2021-12-21 12:13:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.271304347826087) internal successors, (731), 575 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 731 transitions. [2021-12-21 12:13:39,320 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 731 transitions. Word has length 30 [2021-12-21 12:13:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:39,320 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 731 transitions. [2021-12-21 12:13:39,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 731 transitions. [2021-12-21 12:13:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 12:13:39,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:39,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:39,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 12:13:39,322 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1070079280, now seen corresponding path program 1 times [2021-12-21 12:13:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127294515] [2021-12-21 12:13:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:39,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:39,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127294515] [2021-12-21 12:13:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127294515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261286850] [2021-12-21 12:13:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:39,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:39,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:39,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:13:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-21 12:13:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:39,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:13:39,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:39,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-12-21 12:13:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:39,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-12-21 12:13:39,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-12-21 12:13:39,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 12:13:39,608 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-21 12:13:39,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 12:13:39,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-21 12:13:39,841 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-21 12:13:39,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 49 [2021-12-21 12:13:39,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-12-21 12:13:39,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-12-21 12:13:39,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 12:13:39,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 12:13:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:39,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:39,900 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1103 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~q#1.base| v_ArrVal_1103) |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8)) 0)) (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~q#1.base| v_ArrVal_1102) |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8)) 0))) is different from false [2021-12-21 12:13:39,917 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1103 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_1103) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8)) 0)) (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_1102) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8)) 0))) is different from false [2021-12-21 12:13:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:40,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:40,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-21 12:13:40,092 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-21 12:13:40,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 61 [2021-12-21 12:13:40,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:40,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-21 12:13:40,105 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-21 12:13:40,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 62 [2021-12-21 12:13:40,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:40,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:40,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 70 [2021-12-21 12:13:40,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 12:13:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-21 12:13:40,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261286850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:40,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-21 12:13:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999103429] [2021-12-21 12:13:40,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 12:13:40,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 12:13:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=311, Unknown=2, NotChecked=74, Total=462 [2021-12-21 12:13:40,165 INFO L87 Difference]: Start difference. First operand 576 states and 731 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:41,287 INFO L93 Difference]: Finished difference Result 1749 states and 2225 transitions. [2021-12-21 12:13:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 12:13:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 12:13:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:41,292 INFO L225 Difference]: With dead ends: 1749 [2021-12-21 12:13:41,292 INFO L226 Difference]: Without dead ends: 1297 [2021-12-21 12:13:41,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1358, Unknown=2, NotChecked=170, Total=2070 [2021-12-21 12:13:41,293 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 331 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:41,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 614 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 339 Invalid, 0 Unknown, 313 Unchecked, 0.4s Time] [2021-12-21 12:13:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-12-21 12:13:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 861. [2021-12-21 12:13:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.244186046511628) internal successors, (1070), 860 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1070 transitions. [2021-12-21 12:13:41,342 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1070 transitions. Word has length 33 [2021-12-21 12:13:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1070 transitions. [2021-12-21 12:13:41,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1070 transitions. [2021-12-21 12:13:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 12:13:41,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:41,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:41,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 12:13:41,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 12:13:41,557 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1610537933, now seen corresponding path program 1 times [2021-12-21 12:13:41,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:41,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593028064] [2021-12-21 12:13:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:41,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:41,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593028064] [2021-12-21 12:13:41,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593028064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506817677] [2021-12-21 12:13:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:41,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:41,615 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:41,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:13:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 12:13:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:41,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:41,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:41,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:41,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506817677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:41,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:41,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-21 12:13:41,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54636968] [2021-12-21 12:13:41,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:41,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:13:41,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:13:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:13:41,884 INFO L87 Difference]: Start difference. First operand 861 states and 1070 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:42,018 INFO L93 Difference]: Finished difference Result 1695 states and 2117 transitions. [2021-12-21 12:13:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:13:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-21 12:13:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:42,021 INFO L225 Difference]: With dead ends: 1695 [2021-12-21 12:13:42,021 INFO L226 Difference]: Without dead ends: 1013 [2021-12-21 12:13:42,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:13:42,023 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:42,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 116 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:13:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-12-21 12:13:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 863. [2021-12-21 12:13:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.251740139211137) internal successors, (1079), 862 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1079 transitions. [2021-12-21 12:13:42,074 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1079 transitions. Word has length 38 [2021-12-21 12:13:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:42,074 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1079 transitions. [2021-12-21 12:13:42,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1079 transitions. [2021-12-21 12:13:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 12:13:42,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:42,075 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-12-21 12:13:42,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 12:13:42,292 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -76769548, now seen corresponding path program 4 times [2021-12-21 12:13:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037307117] [2021-12-21 12:13:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:42,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:13:42,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037307117] [2021-12-21 12:13:42,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037307117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655309960] [2021-12-21 12:13:42,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:13:42,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:42,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:42,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:42,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:13:42,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:13:42,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:13:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-21 12:13:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:42,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:42,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:42,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:42,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 12:13:42,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2021-12-21 12:13:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2021-12-21 12:13:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2021-12-21 12:13:43,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2021-12-21 12:13:43,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 12:13:43,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:43,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:43,106 INFO L353 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-12-21 12:13:43,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-21 12:13:43,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:43,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 51 [2021-12-21 12:13:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:43,257 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 12:13:43,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-21 12:13:43,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:13:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:43,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:43,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:43,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 420 [2021-12-21 12:13:43,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 252 [2021-12-21 12:13:43,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 104 [2021-12-21 12:13:44,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:44,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 390 [2021-12-21 12:13:44,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 409 treesize of output 403 [2021-12-21 12:13:44,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 426 treesize of output 420 [2021-12-21 12:13:44,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:44,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 439 treesize of output 437 [2021-12-21 12:13:44,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 12:13:44,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 353 [2021-12-21 12:13:44,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 349 [2021-12-21 12:13:44,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 345 [2021-12-21 12:13:44,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 349 [2021-12-21 12:13:44,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 354 [2021-12-21 12:13:44,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 354 treesize of output 352 [2021-12-21 12:13:44,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 347 treesize of output 345 [2021-12-21 12:13:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:44,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655309960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:44,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:44,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2021-12-21 12:13:44,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497979236] [2021-12-21 12:13:44,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:44,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 12:13:44,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 12:13:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=550, Unknown=7, NotChecked=0, Total=650 [2021-12-21 12:13:44,784 INFO L87 Difference]: Start difference. First operand 863 states and 1079 transitions. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:46,637 INFO L93 Difference]: Finished difference Result 991 states and 1239 transitions. [2021-12-21 12:13:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-21 12:13:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-21 12:13:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:46,640 INFO L225 Difference]: With dead ends: 991 [2021-12-21 12:13:46,640 INFO L226 Difference]: Without dead ends: 989 [2021-12-21 12:13:46,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=725, Invalid=2460, Unknown=7, NotChecked=0, Total=3192 [2021-12-21 12:13:46,642 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 172 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:46,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 529 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 441 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2021-12-21 12:13:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-12-21 12:13:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 817. [2021-12-21 12:13:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.2524509803921569) internal successors, (1022), 816 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1022 transitions. [2021-12-21 12:13:46,704 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1022 transitions. Word has length 39 [2021-12-21 12:13:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:46,704 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1022 transitions. [2021-12-21 12:13:46,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1022 transitions. [2021-12-21 12:13:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 12:13:46,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:46,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:13:46,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:46,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 12:13:46,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1871575436, now seen corresponding path program 2 times [2021-12-21 12:13:46,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403256649] [2021-12-21 12:13:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:46,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:13:47,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403256649] [2021-12-21 12:13:47,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403256649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808146031] [2021-12-21 12:13:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:13:47,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:47,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:47,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 12:13:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:13:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:13:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-21 12:13:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 12:13:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 12:13:47,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-12-21 12:13:47,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-21 12:13:47,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:47,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:47,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:47,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2021-12-21 12:13:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:47,504 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 12:13:47,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-21 12:13:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:13:47,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:13:49,557 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1552 Int)) (or (not (< v_ArrVal_1552 |c_#StackHeapBarrier|)) (and (forall ((v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1551 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_1552 (store v_ArrVal_1556 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1556) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1551) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1552)) v_ArrVal_1552) 8) 0)) (forall ((v_ArrVal_1555 (Array Int Int)) (v_ArrVal_1560 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 (store v_ArrVal_1560 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1560) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1555) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_1552) 8) 0))))) is different from false [2021-12-21 12:13:49,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2021-12-21 12:13:49,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 126 [2021-12-21 12:13:49,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:49,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 138 [2021-12-21 12:13:49,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:13:49,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 146 [2021-12-21 12:13:49,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-21 12:13:49,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-21 12:13:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 9 not checked. [2021-12-21 12:13:49,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808146031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:13:49,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:13:49,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2021-12-21 12:13:49,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440781957] [2021-12-21 12:13:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:49,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 12:13:49,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 12:13:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=189, Unknown=1, NotChecked=28, Total=272 [2021-12-21 12:13:49,947 INFO L87 Difference]: Start difference. First operand 817 states and 1022 transitions. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:52,074 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((v_ArrVal_1552 Int)) (or (not (< v_ArrVal_1552 |c_#StackHeapBarrier|)) (and (forall ((v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1551 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_1552 (store v_ArrVal_1556 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1556) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1551) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1552)) v_ArrVal_1552) 8) 0)) (forall ((v_ArrVal_1555 (Array Int Int)) (v_ArrVal_1560 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 (store v_ArrVal_1560 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1560) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1555) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_1552) 8) 0))))) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0) (= .cse0 |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse1) (= |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0) (= .cse0 0) (= .cse1 0))) is different from false [2021-12-21 12:13:54,079 WARN L838 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((v_ArrVal_1552 Int)) (or (not (< v_ArrVal_1552 |c_#StackHeapBarrier|)) (and (forall ((v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1551 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_1552 (store v_ArrVal_1556 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1556) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1551) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1552)) v_ArrVal_1552) 8) 0)) (forall ((v_ArrVal_1555 (Array Int Int)) (v_ArrVal_1560 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 (store v_ArrVal_1560 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1560) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1555) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_1552) 8) 0))))) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0)) is different from false [2021-12-21 12:13:56,176 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((v_ArrVal_1552 Int)) (or (not (< v_ArrVal_1552 |c_#StackHeapBarrier|)) (and (forall ((v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1551 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_1552 (store v_ArrVal_1556 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1556) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_1552 v_ArrVal_1551) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1552)) v_ArrVal_1552) 8) 0)) (forall ((v_ArrVal_1555 (Array Int Int)) (v_ArrVal_1560 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 (store v_ArrVal_1560 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1560) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1552 v_ArrVal_1555) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_1552) 8) 0))))) (= |c_ULTIMATE.start_choose_next_~q#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0) (= .cse0 |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse1) (= |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0) (= .cse0 0) (= .cse1 0))) is different from false [2021-12-21 12:13:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:56,356 INFO L93 Difference]: Finished difference Result 2468 states and 3099 transitions. [2021-12-21 12:13:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 12:13:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 12:13:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:56,361 INFO L225 Difference]: With dead ends: 2468 [2021-12-21 12:13:56,361 INFO L226 Difference]: Without dead ends: 1752 [2021-12-21 12:13:56,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=131, Invalid=433, Unknown=4, NotChecked=188, Total=756 [2021-12-21 12:13:56,363 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 290 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2021-12-21 12:13:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-12-21 12:13:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1497. [2021-12-21 12:13:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.2600267379679144) internal successors, (1885), 1496 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1885 transitions. [2021-12-21 12:13:56,460 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1885 transitions. Word has length 41 [2021-12-21 12:13:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:56,460 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 1885 transitions. [2021-12-21 12:13:56,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1885 transitions. [2021-12-21 12:13:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 12:13:56,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:56,461 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-12-21 12:13:56,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 12:13:56,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 12:13:56,679 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2115090350, now seen corresponding path program 5 times [2021-12-21 12:13:56,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898771016] [2021-12-21 12:13:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:56,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:13:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:13:57,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:13:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898771016] [2021-12-21 12:13:57,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898771016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:13:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430602321] [2021-12-21 12:13:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:13:57,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:13:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:13:57,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:13:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 12:13:57,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 12:13:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:13:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 195 conjunts are in the unsatisfiable core [2021-12-21 12:13:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:13:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:13:57,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:57,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 12:13:57,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:13:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2021-12-21 12:13:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2021-12-21 12:13:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:57,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2021-12-21 12:13:57,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2021-12-21 12:13:57,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2021-12-21 12:13:57,824 INFO L353 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-12-21 12:13:57,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-12-21 12:13:57,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:57,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,329 INFO L353 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2021-12-21 12:13:58,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 83 [2021-12-21 12:13:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2021-12-21 12:13:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-21 12:13:58,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 70 [2021-12-21 12:13:58,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-21 12:13:58,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:58,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:13:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,371 INFO L353 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2021-12-21 12:13:58,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-12-21 12:13:58,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:13:58,714 INFO L353 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-12-21 12:13:58,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 101 [2021-12-21 12:13:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:13:58,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-12-21 12:13:58,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:13:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 12:13:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444679587] [2021-12-21 12:13:58,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:13:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:13:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:13:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:13:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-12-21 12:13:58,721 INFO L87 Difference]: Start difference. First operand 1497 states and 1885 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:13:59,477 INFO L93 Difference]: Finished difference Result 1531 states and 1925 transitions. [2021-12-21 12:13:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 12:13:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 12:13:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:13:59,481 INFO L225 Difference]: With dead ends: 1531 [2021-12-21 12:13:59,481 INFO L226 Difference]: Without dead ends: 1529 [2021-12-21 12:13:59,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-12-21 12:13:59,482 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 97 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:13:59,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 399 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 12:13:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-12-21 12:13:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1500. [2021-12-21 12:13:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 1.2601734489659773) internal successors, (1889), 1499 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1889 transitions. [2021-12-21 12:13:59,583 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1889 transitions. Word has length 42 [2021-12-21 12:13:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:13:59,584 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 1889 transitions. [2021-12-21 12:13:59,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:13:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1889 transitions. [2021-12-21 12:13:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 12:13:59,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:13:59,585 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-12-21 12:13:59,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-21 12:13:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 12:13:59,801 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:13:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:13:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash 812495412, now seen corresponding path program 6 times [2021-12-21 12:13:59,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:13:59,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785767060] [2021-12-21 12:13:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:13:59,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:13:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:00,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:00,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785767060] [2021-12-21 12:14:00,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785767060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:00,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505250550] [2021-12-21 12:14:00,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 12:14:00,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:00,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:00,244 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:00,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 12:14:00,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 12:14:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:00,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 199 conjunts are in the unsatisfiable core [2021-12-21 12:14:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:00,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:14:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:14:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:14:00,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-21 12:14:00,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,970 INFO L353 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2021-12-21 12:14:00,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 67 [2021-12-21 12:14:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-12-21 12:14:00,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-12-21 12:14:00,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2021-12-21 12:14:00,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,006 INFO L353 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-12-21 12:14:01,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-21 12:14:01,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 56 [2021-12-21 12:14:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,557 INFO L353 Elim1Store]: treesize reduction 100, result has 9.9 percent of original size [2021-12-21 12:14:01,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 98 [2021-12-21 12:14:01,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2021-12-21 12:14:01,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 81 [2021-12-21 12:14:01,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:01,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:01,588 INFO L353 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2021-12-21 12:14:01,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-12-21 12:14:02,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:14:02,156 INFO L353 Elim1Store]: treesize reduction 174, result has 7.4 percent of original size [2021-12-21 12:14:02,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 302 treesize of output 140 [2021-12-21 12:14:02,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:02,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:02,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:02,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-12-21 12:14:02,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:14:02,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-21 12:14:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513607496] [2021-12-21 12:14:02,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:14:02,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:14:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-12-21 12:14:02,168 INFO L87 Difference]: Start difference. First operand 1500 states and 1889 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:03,134 INFO L93 Difference]: Finished difference Result 3055 states and 3852 transitions. [2021-12-21 12:14:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 12:14:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-21 12:14:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:03,138 INFO L225 Difference]: With dead ends: 3055 [2021-12-21 12:14:03,138 INFO L226 Difference]: Without dead ends: 1622 [2021-12-21 12:14:03,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 12:14:03,140 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 255 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:03,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 465 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:14:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-21 12:14:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1538. [2021-12-21 12:14:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 1.258945998698764) internal successors, (1935), 1537 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 1935 transitions. [2021-12-21 12:14:03,244 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 1935 transitions. Word has length 45 [2021-12-21 12:14:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:03,244 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 1935 transitions. [2021-12-21 12:14:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 1935 transitions. [2021-12-21 12:14:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 12:14:03,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:03,245 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:03,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:03,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:03,462 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1996885813, now seen corresponding path program 2 times [2021-12-21 12:14:03,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486875109] [2021-12-21 12:14:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:03,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:14:03,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486875109] [2021-12-21 12:14:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486875109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899289815] [2021-12-21 12:14:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:14:03,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:03,563 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:03,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 12:14:03,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:14:03,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:03,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-21 12:14:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:03,810 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-21 12:14:03,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-21 12:14:03,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:03,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:03,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-21 12:14:03,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-21 12:14:03,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-21 12:14:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:03,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:14:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:03,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-12-21 12:14:03,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-12-21 12:14:03,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-12-21 12:14:03,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:04,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-12-21 12:14:04,143 INFO L353 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-12-21 12:14:04,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 41 [2021-12-21 12:14:04,153 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-21 12:14:04,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-12-21 12:14:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:14:04,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:04,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~new_process~0#1.base_22| Int) (v_ArrVal_2202 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~n#1.offset_15| Int)) (or (not (< |v_ULTIMATE.start_main_~new_process~0#1.base_22| |c_#StackHeapBarrier|)) (not (= (let ((.cse1 (+ |v_ULTIMATE.start_append_to_queue_~n#1.offset_15| 8))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| (store v_ArrVal_2202 .cse1 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| v_ArrVal_2202) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse0 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| |v_ULTIMATE.start_main_~new_process~0#1.base_22|))) |v_ULTIMATE.start_main_~new_process~0#1.base_22|) .cse1)) 0)))) is different from false [2021-12-21 12:14:04,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 188 [2021-12-21 12:14:04,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 210 [2021-12-21 12:14:04,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 232 [2021-12-21 12:14:04,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 238 [2021-12-21 12:14:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 21 not checked. [2021-12-21 12:14:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899289815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:04,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:04,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2021-12-21 12:14:04,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771099836] [2021-12-21 12:14:04,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:04,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:14:04,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:14:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2021-12-21 12:14:04,400 INFO L87 Difference]: Start difference. First operand 1538 states and 1935 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:04,426 WARN L838 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((|v_ULTIMATE.start_main_~new_process~0#1.base_22| Int) (v_ArrVal_2202 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~n#1.offset_15| Int)) (or (not (< |v_ULTIMATE.start_main_~new_process~0#1.base_22| |c_#StackHeapBarrier|)) (not (= (let ((.cse1 (+ |v_ULTIMATE.start_append_to_queue_~n#1.offset_15| 8))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| (store v_ArrVal_2202 .cse1 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| v_ArrVal_2202) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse0 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| |v_ULTIMATE.start_main_~new_process~0#1.base_22|))) |v_ULTIMATE.start_main_~new_process~0#1.base_22|) .cse1)) 0)))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0)) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) is different from false [2021-12-21 12:14:04,434 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (< (+ .cse0 1) |c_ULTIMATE.start_main_~#queue~0#1.base|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((|v_ULTIMATE.start_main_~new_process~0#1.base_22| Int) (v_ArrVal_2202 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~n#1.offset_15| Int)) (or (not (< |v_ULTIMATE.start_main_~new_process~0#1.base_22| |c_#StackHeapBarrier|)) (not (= (let ((.cse2 (+ |v_ULTIMATE.start_append_to_queue_~n#1.offset_15| 8))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| (store v_ArrVal_2202 .cse2 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| v_ArrVal_2202) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| |v_ULTIMATE.start_main_~new_process~0#1.base_22|))) |v_ULTIMATE.start_main_~new_process~0#1.base_22|) .cse2)) 0)))) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8)) 0)) (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0))) is different from false [2021-12-21 12:14:04,440 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (< (+ .cse0 1) |c_ULTIMATE.start_main_~#queue~0#1.base|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#queue~0#1.base|) (forall ((|v_ULTIMATE.start_main_~new_process~0#1.base_22| Int) (v_ArrVal_2202 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~n#1.offset_15| Int)) (or (not (< |v_ULTIMATE.start_main_~new_process~0#1.base_22| |c_#StackHeapBarrier|)) (not (= (let ((.cse2 (+ |v_ULTIMATE.start_append_to_queue_~n#1.offset_15| 8))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| (store v_ArrVal_2202 .cse2 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~new_process~0#1.base_22| v_ArrVal_2202) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| |v_ULTIMATE.start_main_~new_process~0#1.base_22|))) |v_ULTIMATE.start_main_~new_process~0#1.base_22|) .cse2)) 0)))) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) (+ .cse3 8)) 0)) (= .cse3 |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~#queue~0#1.offset| 0) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse0))) is different from false [2021-12-21 12:14:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:04,627 INFO L93 Difference]: Finished difference Result 2949 states and 3720 transitions. [2021-12-21 12:14:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 12:14:04,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-21 12:14:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:04,632 INFO L225 Difference]: With dead ends: 2949 [2021-12-21 12:14:04,632 INFO L226 Difference]: Without dead ends: 1551 [2021-12-21 12:14:04,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=168, Unknown=4, NotChecked=116, Total=342 [2021-12-21 12:14:04,634 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:04,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 219 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-12-21 12:14:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2021-12-21 12:14:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1546. [2021-12-21 12:14:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 1.258252427184466) internal successors, (1944), 1545 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 1944 transitions. [2021-12-21 12:14:04,745 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 1944 transitions. Word has length 46 [2021-12-21 12:14:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:04,745 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 1944 transitions. [2021-12-21 12:14:04,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 1944 transitions. [2021-12-21 12:14:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 12:14:04,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:04,746 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:04,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:04,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:04,964 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1779163624, now seen corresponding path program 3 times [2021-12-21 12:14:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308382001] [2021-12-21 12:14:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:04,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:05,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308382001] [2021-12-21 12:14:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308382001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:05,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105481858] [2021-12-21 12:14:05,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:14:05,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:05,476 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:05,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 12:14:05,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 12:14:05,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-21 12:14:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:05,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 12:14:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:14:05,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:05,745 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-21 12:14:05,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 12:14:05,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2021-12-21 12:14:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 12:14:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-12-21 12:14:05,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-21 12:14:05,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 12:14:05,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 12:14:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:05,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 12:14:06,115 INFO L353 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-12-21 12:14:06,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 50 [2021-12-21 12:14:06,135 INFO L353 Elim1Store]: treesize reduction 24, result has 50.0 percent of original size [2021-12-21 12:14:06,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 38 [2021-12-21 12:14:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:14:06,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-21 12:14:06,335 INFO L353 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-21 12:14:06,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 64 [2021-12-21 12:14:06,359 INFO L353 Elim1Store]: treesize reduction 65, result has 35.0 percent of original size [2021-12-21 12:14:06,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 51 [2021-12-21 12:14:06,372 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 12:14:06,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2021-12-21 12:14:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:14:06,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-12-21 12:14:06,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-21 12:14:06,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-21 12:14:06,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:14:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:14:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:06,616 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2395 Int) (v_ArrVal_2397 (Array Int Int)) (v_ArrVal_2396 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 4) v_ArrVal_2395)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2396) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2397) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4)))) (= |c_ULTIMATE.start_choose_next_#t~mem5#1| 1)) is different from false [2021-12-21 12:14:06,637 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_choose_next_~node~0#1.offset| Int)) (or (forall ((v_ArrVal_2395 Int) (v_ArrVal_2397 (Array Int Int)) (v_ArrVal_2396 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |ULTIMATE.start_choose_next_~node~0#1.offset| 4) v_ArrVal_2395)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2396) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2397) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |ULTIMATE.start_choose_next_~node~0#1.offset| 4)) 1))) is different from false [2021-12-21 12:14:06,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2395 Int) (|v_ULTIMATE.start_choose_next_~node~0#1.offset_30| Int) (v_ArrVal_2397 (Array Int Int)) (v_ArrVal_2396 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8)))) (let ((.cse1 (select |c_#memory_int| .cse0)) (.cse2 (+ |v_ULTIMATE.start_choose_next_~node~0#1.offset_30| 4))) (or (<= 1 (select (select (store |c_#memory_int| .cse0 (store .cse1 .cse2 v_ArrVal_2395)) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2396) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2397) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4))) (= (select .cse1 .cse2) 1))))) is different from false [2021-12-21 12:14:09,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:14:09,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 364 [2021-12-21 12:14:09,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:14:09,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39036 treesize of output 37009 [2021-12-21 12:14:09,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53826 treesize of output 53570 [2021-12-21 12:14:09,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53570 treesize of output 53058 [2021-12-21 12:14:09,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:14:09,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60433 treesize of output 59183